Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e0fc4aa84495fb…

MALICIOUS

PDF

67.9 KB Created: 2021-06-05 16:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f1e9b326ed8c2b202048f73823c1eb1 SHA-1: e8fec2bf145937614f509d515a180f01a3163243 SHA-256: e6e0fc4aa84495fbc2996ef5ae2cc34e83a813e40ee269bef8379cbf38377b70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to design, masking the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=how+to+design+a+border+on+paper
    • https://allmassage.net/upload/file/20210602180558.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5a95175e7---55854622043.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b328d42b89---bazibilozamegezotu.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8838080291e4b037884865777ce14e5a/dejelizewegaz.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/52d2dd70b560ece71282547202f73a4d/17115416764.pdf
    • https://bamfieldrental.com/userfiles/file/1189683102.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/fh5nuf7u1ide3slfgvrr4n52am/figatutasip.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/7ug0vj5rk2uhhuuf8mi74ic585/14934135448.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc85ed722---kixodukej.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/bc3df5c47a68dab2e5fcfb95ec983f2d/35596417820.pdf
    • https://betalinktech.com/blmedia/file/givikebori.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608107d899c29---jomun.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/8e55c8510186b99416a309d36e3721bd/36800392907.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/2f3ad3eb150a41007341157f8737aa30/neboxeguguroboweker.pdf
    • http://kulturazebrak.cz/userfiles/bumositoguwi.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/7b42c2eda15e6d95cba5851f02003ca5/zobubizimez.pdf
    • http://broadgatecapital.com/userfiles/file/98682526206.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce66.bin
f2c1140b2e1516f1071d0810134c1eca57406640a4a55e9e89f33a64d0f110d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE66 5288 bytes
font_01_sfnt_off0000e07c.bin
7931d047c7ce0411139c12d8b61fc94029f6ca6a6db6c766731a418ee576a7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE07C 10164 bytes

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